Cartridge-loading magazine pencil



Junev12-1928.

A. FLEMING GARTRIDGE nomine MAGAZINE PENCIL Fifed Aug. 13, 192s IIIII'IO III ATTO RN EY Patented June 12, 1928.

PATENT OFFICE.'

AMBROSE FLEMING, OF WASHINGTON, DISTRICT 0F COLUMBIA.

CARTRIDGE-LOADING' MAGAZINE PENCIL.

application inea August 13, 1923. serial No. 657,138.

The invention relates to that class of pencils wherein is embodied a magazine for carrying a number of leads and means for feeding the leads one by one into position for use.

The invention has for its object to provide a pencil of the type stated in which the magazine for holding the plurality of leads is in the nature of a cartridge in which leads may be contained within the pencil and which is adaptable to be readily inserted into cooperative relation with the pencil parts with the leads contained therein.

' A further object of the invention is to provide a cartridge magazine of such construction thatthe same may be used as a lead container and sold in' the trade as such and which is constructed in such manner that it may be readily inserted into the type of pencil with which it cooperates for use there- 1n.

A further object of the invention resides in the positioning of the cartridge magazine within the portions of the pencil body in a manner whereby the said cartridge effects a connection between the said pencil portions and in the positioning of the magazine in the said pencil body in a manner whereby the leads may be fed therefrom individually and in a manner which insures against breakage thereof.

A further object of the invention is to provide means for positioning the magazine within the pencil body in -a manner for preventing dis'placement thereof and for locking the separable parts of the pencil body in cooperative relation over the said magazine.

The invention has a still further object in providing a means for insuring against feeding of the leads discharging and adjusting plunger to a point beyond the activ range provided therefor.

With the above and other objects in view that will hereinafter appear, the invention .further resides in those novel details of construction, combination and arrangement of parts, all of which will be first fully described and be particularly pointed out in the appended claims', reference being had to the accompanying drawings, in which:

Figure 1 is an enlarged central longitudinal section of the invention.

Figure 2 is an enlarged detail cross section taken on the line 2 2 of Figure 1.

Figure 3 is an enlarged detail cross section taken on the line 3-3 of Figure 1.

Figure 4 is an enlarged detail cross section taken on the line 4-4 of Figure 1.

Figure 5 is a detail perspective view of the magazine body and set of end covers therefor, the latter being shown separated from the former.

l Figure 6 is a detail perspective view of the open end of the plunger actuating tube.

Fi 'ure 7 is an enlarged detail central longitu inal i section illustrating the plunger taken on In the practical development of my invention I provide a cartridge magazine 1 suitably stamped from thin sheet metal to provide a centrally disposed lead receiving portion and guide 2, an enlarged leads holding or magazine portion 3 and a non-circular portion 4, the purposes for which will later appear.

It is one of the principal objects of my invention to thusl form a cartridge Vin the simple and inexpensivemanner shown and described such as may be readily sold on the market for a nominal price with the charge of leads contained in the magazine portion thereof and with the ends thereof covered over `by a pair of opposing end cap members 5, see Figures 5 and 8. Thus it will be readily understood that when the user of the pencil, constructed in accordance with my invention, has exhausted theA supp ly of leads contained in the cartridge magazine at thatv time cooperating therewith he 'may readily purchase a new leads containing cartridge with the ends thereof capped to form a container, and by removing the caps 5 thereof he may substitute the filled cartridge 1` for the exhausted cartridge 1 in his pencil and continue to use the leads contained therein in the manner hereinafter to be dcscribed.

In the practical development of the pencil body with which my improved cartridge magazine cooperates I provide an open ended cylindrical casing member or body 6 which is provided with the usual pocket retaining clip 7, the position of which, as will hereinafter clearly appear, has a purpose in cooperation with the invention.

A nose portion 8 cooperates with the main body portion 6 and includes a cylindrical portion which, together with the adjacent end of the main body portion 6, are adapted to fit over and frictionally engage the magazine cartridge 1 to be held in cooperative relation thereby.

The nose member 8 may or may not be provided with the usual steel leads engaging discharge throat- 9 and the said nose member is provided with a centrally disposed guide 'tube 10 secured to the cross plug 11, fitted into the cylindrical portion of the said nose member 8, and steel nose 9, if such is provided, otherwise with the converging end of said nose. The cross plug 11 is provided with a bevelled entrance aperture 12 to facilitate the entrance of the lead thereinto and the'cross plug 11 forms an end abutment for the adjacent end of the cartridge magazine 1.

Another cross plug 13 is forced' into the cylindrical casing 1 to have fixedrlation therewith and to form an end closure or abutment for that end of the lead magazine cartridge 1 opposite the end which engages the cross plug 11. 'A small tubular barrel or plunger guide 14 is secured within the central aperture of the closure plug 13 and extends rearwardly thereof through the open end of the main casing 6.

A leads discharging and adjusting lunger rod 15 is adapted to be guided by t e tube.

14 and to'be operated longitudinallyin such manner that it will pass through the centra] portion 2 of the cartridge magazine 1 to force the particular lead contained theref in out through the bevelled aperture 12, the

ide tube' 10, and the rippm nose 9 for e. The plunger 15 iis provigded with a. right angularly turned opeating head 16 which projects through a longitudinal slot provided for the movement thereof in the guide tube 14 and the said projected portion 16 of the plunger 15 is adapted to be actedupon in a mannersoon to be described for veffecting the desired longitudinal movement of the said plunger. l

A rotating head 18 is rotatably enclosed in the outer open end of the main casing 6 and the said head has a reduced and `threaded portion 19 adapted to receive -an acornshaped closure cap which fits over the recessl or bore 20 provided in the head 18 for accommodating an eraser 21 and for another purpose soon to be described.

A plunger actuating tube 22 is fixed to the rotating head 18 so as to be rotated thereby and the said tube 22 is adapted to surround the guide tube 14:,.and is provided internally thereof with a feed or operating screw 23 adapted to engage the operating head 16 of the plunger 15 to move the same backward and forward longitudinall The `forward open end ofy the plunger actuating tube 22 is provided with a slot 24 through which the end 25 of the feed screw 23 may project in a manner for effecting a termination of the function thereof short of the end of the tube, see Figures 1 and 6.

It will be readily understood that this same effect might be accomplished by merely cutting short thedegree of extension of this screw and such as lwould depend upon the type of feed screw provided, it belng understood that'this screw may be constructed by fixing a coil spring within the casing 22 to constitute an internal threadway or by- 'the mechanism became strained and in some instances the plunger forced to a point 0f inoperativeness. It is, therefore, one of the objects of my invention to provide a safety means against such destruction by the user of my pencil by the eifect of unnecessary and unusual rotation of the head due to absentmindedness of the user. I

In carrying out this feature of my invention I p rovide a plunger kick-back head member 26 in the nature'of a small flanged cylinder adapted to freely slide along the inner end of the guide tube 14 with the cylindrical portion 26 thereof normal] forced inside of and in cooperative relation with the forward open end of the plunger actuating tube 22 through the medium of a coil spring 28 Aacting against the flange 27 thereof.

In a pencil embodying this feature of my invention, should one absent-mindedly rotate the head so as to force the operating headof the plunger 15 beyond the extended end 25 of the feed screw 23 so as to be forced out of the influence thereof, the said plunger would be immediately forced back into place.

kick-back action due to the tension stored up in the spring 28 so that it is impossible to force the operating head out to an inoperative position, but the same is always held in operative cooperation with the screw 23 so that upon reverse rotation of the rotating head 18 the plunger will be withdrawn from the magazine 1 to permit the dropping of a lead into the central portion thereof.

For securely holding the operating'head 18 to its cooperative relation to the open end of the cylinder 6 the guide tube 14 projects through the said head 18 and into the recess 20 therein, where the said tube is properly threaded, as at 29, to receive retaining and jam nut members 30 for holding the said rotating head to its proper position. These retaining and jam nuts may be of construction such as illustrated in Figures 1 and 3 and are provided with notched portions 31 for receiving a suitable operating wrench.

Assume the parts to be in position such as is illustrated in Figure l of the drawings, that is, with the plunger 15 forced forwardly to effect the discharge andadjustment of a lead being used. When this forward movement ofthe plunger is continued to its limit and it is desired to drop a new lead into the central guide portion 2 of the cartridge magazine 1 and the guide tube 10, the rotating'head 18 will be rotated in the reverse direction to retract the plunger 15 out of the limits of the said magazine 1 so as to wholly open the central passage or guidel portion 2 thereof. This being accomplished it is only necessary to jar the pencil to effect the dropping of a new lead fromthe magazine portion 3 of the cartridge 1 into the guide portion 2. In the practical development of my invention I position the retaining clip 7 in a manner for indicating the position of the passageway from the magazine portion 3 of the cartrldge 1 into the guide portion 2 thereof so that the user of the pencil may take this point into consideration when jarring a new lead Vinto By reason of the simple construction of the pencil shown and the positioningof the cartridge magazine'l therein in a manner for holding the two parts of the pencil together and with the open end's'of the magazine cartridge 1 suitably closed and bounded by the cross plugs 13 and 11 and the cooperation therewith of the guide tube 10 and the plunger mechanism 15 and its advancing mechanism a practical means for feeding the plurality of leads contained within the magazine portion 3 of the cartridge 1 1s provided'for in a manner whereby they will be fed one at a time out into the grippin nose 9 and in a manner whereby breakage o the leads while feeding is absolutely done away with.

Figures 9, 10 and 11, show, .on an 'enloc ing the parts 8 and 6 of the pencil body together over the magazine body 1 and the means for preventing rotation of the mager.

zine within the pencil body. Thelmagazine larged scale, the provision which is made for i body 1 is provided with .a grooveway 34:.

vnotched end 36 projected through and in locked engagement with the passageway 37 provided therefor in the'cross plug 11, see Figure 10. v

From the-foregoing description, taken in connection with the accompanying drawings, it is thought the complete construction, o eration and advantages of my invention will be clear to those skilled in the art.

What I claim is:

1. Apencil of the type stated, comprising a vtwo part casing, aleads carrying magazine mountable wlthin the casing in a manner for forming a connection medium between the two parts of the casing, a cross plug in the front part of the pencil casing and having a central aperture therethrough and a bevelled entrance to said aperture, a centrally disposed lead guide tube secured in the aperture throu h the aperture in the plug and extending orwardly to the discharge of the front casing portion, a cross plug in the rear part of the pencil casing Arear end and which is provided with a longitudinal slot and has its extended end threaded, a lead engaging lunger guided by the plunger guide tube an having an operating head extending through the longitudinal slot thereof, a rotating head rotatably mounted in the rear open end of the pencil casing, means for rotatably and removably securmg the said head upon the threaded end of the plunger guide tube, a plunger actuating tube secured to the rotating head and adapted to surround the plunger guide tube, a spiral threadway in the actuating tube adapted to engage the plunger head to move the plunger longitudinally, and a spring actuated kick back device for preventing movement of the plunger head out of cooperative relation with the spiral threadway.

2. A pencil of the type stated, comprising a two part casing, a leads carrying magazinemountable within the casing in a manner yfor forming a. connectingI medium between the two parts of the casing, and means for locking the two parts of the pencil bod the two parts of the pencilbody to ether, together, and means for ejecting the lea s and for preventing rotation'of the sai mag- 10 from the ma azine one at a time. avzine, and means outside the pencil body for 3. A penci of the type stated, comprising indicating the position of said magazine 5 a two part casing, a leads carrying magazine Within the said body, and means for ejecting mountable within the casingl in a manner for the leads from the magaziney one at a time. forming a connecting mediumv between the two parts of the casmg, means for locking A AMBROSE FLEMING. 

